Statistical and Hydrogeochemical Comparison of groundwater quality of western and eastern plains of Kurdistan Province
Shirko
Ebrahimi Mohammadi
Department of Range and Watershed engineering, Faculty of Natural Resources, University of Kurdistan, Sanandaj, Iran
author
text
article
2018
per
This study aim to the water quality comparison of Ghorveh plain (One of the main center of potato production) and Marivan plain (One of the main center of tobacco production) in the east and west of Kurdistan province respectively. Sum of the Anions, sum of Cations, Chlorine, Sulfate, Bicarbonate, Potassium, Calcium, Magnesium, Sodium ions and Sodium Absorption Ratio, Alkalinity, Total Hardness, Total Dissolved Solids and Electrical Conductivity data of groundwater in both plains between 1998 to 2016 were compared by drawing water quality diagrams, calculation of indices, determine different ionic ratios and groundwater quality mapping using GIS. To find the distribution of data, chi-square test at the 95% confidence and for comparison of variables, independent t-test at the confidence level of 99%, was used. The results showed that in both Ghorveh and Marivan plains, cations from abundant to scarce be calcium, magnesium, sodium and potassium, and anions from abundant to scarce be bicarbonate, sulfate and chlorine. Based on the results, there is not a significant difference between the mean values of bicarbonate, potassium, calcium, alkalinity, total hardness and CO2 saturation index groundwater of Marivan and Qorveh plains. The mean values of other studied variables, ions ratios and indices were significantly different at the 99% confidence level.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
287
300
https://jne.ut.ac.ir/article_68677_0483999d073738204e81b54cfcf28392.pdf
dx.doi.org/10.22059/jne.2018.233988.1388
Removal of copper and zinc from aqueous solution using nanostructured absorber phragmites australis
ali
bafkar
water engineering
author
hoda
kahrizi
graudjuated
author
masoma
frasati
razi asisstant profesor
author
text
article
2018
per
The aim of this study was to determine the effectiveness of phragmites australis nanostructured for removal of zinc and copper ions from aqueous solutions. Nanostructured phragmites australis was prepared for this purpose and effect of factors such as pH, contact time, initial concentration and adsorbent dosage on the removal of copper and zinc metals in a batch system check and adsorption isotherms and kinetics models were fitted and at the end zinc and copper ions desorbed by the adsorbent was investigated. To determine the absorption characteristics of the test SEM, PSA and FTIR was used. Manufactured by electronic microscopy imaging of nano-adsorbents showed that the percentages of %18.5 was nanoparticle and %81.5 was in the range of nanostructured particles. The results showed that the optimum pH value for both metals was 6, the contact time was 90 min, and initial concentration and adsorbent dosage were 10 ppm and 0.5 g. The Langmuir isotherm model for both zinc and copper ions with maximum R2 (0.98 and 0.99 respectively) and lowest RMSE (0.11 and 0.04 respectively) correlated with data. The kinetic model fitted the model Hoo for both zinc and copper ions with maximum R2 (0.99 and 0.98 respectively) and lowest RMSE (0.04 and 0.07 respectively) most consistent respectively. Desorption results showed that the metals desorption efficiency during 3 cycles for zinc and copper ions (%72 and %75 respectively) occurred in the first cycle.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
301
314
https://jne.ut.ac.ir/article_68678_bda19ed766c0436c5e348e4a9f4f112a.pdf
dx.doi.org/10.22059/jne.2018.234833.1392
Phylogeny and genetic diversity of Wild goat, Capra aegagrus (Erxleben, 1777) in Mazandaran Province based on D-loop region of mt-DNA
Seyedeh Mozhgan
Hosseini Heidari
MSc Graduated of Environmental Sciences, University of Guilan
author
Saeid
Naderi
Academic staff, University of Guilan, Natural Resources Faculty, Department of Environment
author
Hassan
Rajabi Maham
Academic staff of Shahid Beheshti University, Faculty of Life Sciences and Biotechnology, Department of Animal Sciences and Biotechnology
author
Hamid-Reza
Rezaei
Academic staff, Gorgan University of Agricultural Sciences and Natural resources, Environment and Fishery Sciences Faculty, Environmental Science Department
author
text
article
2018
per
Wild goat (Capra aegagrus), as an important and indicator species of mountainous regions of Iran has been confronted to population decline in recent years. So that, its conservation status classified as "Vulnerable" species. In present study, the phylogenetics relationships and genetic diversity of bezoar, based on polymorphism of D-loop region of mt-DNA has been investigated in three different habitats of Mazandaran Province; Kamarbon, Bandbon and Baladeh protected areas. The obtained phylogenetics trees show seven discrete clades and studied individuals of present study have the common ancestor and minimum two different origins for Mazandaran's Wild goats. As well, using Fst/1-Fst distance genetics matrix, the obtained NJ phylogeographic tree show the relationship between genetics and geography in three studied habitats and also with neighbor geographic areas. The results of genetic indicators such as Fu's Fs and Tajima's D show the mutation-genetic drift equilibrium in studied populations. On the other hand, regarding SSD and r factors amounts in Mismatch distribution analysis, the match of expected and observed amounts show the normality and expansion of the studied populations. The Analysis of Molecular Variation (AMOVA), regarding each haplogroup as one population show significant genetic difference between different clades of different haplogroups. Also, the high value of Fst indicator represents the significant genetic differentiation of different clades of wild goats.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
315
327
https://jne.ut.ac.ir/article_68676_ba0933fb225fe68a251618e6f06556dc.pdf
dx.doi.org/10.22059/jne.2018.233561.1384
Isotherm and Thermodynamic studies of Removal phenol by molecular sieve MCM-48
فاطمه
رابع
دانشجو
author
زهره
سعادتی
هیات علمی دانشگاه آزاد اسلامی واحد امیدیه
author
text
article
2018
per
AbstractSome water and wastewater pollutants cannot be eliminated with traditional treatment methods. This has encouraged workers to focus on high performance and environmentally friendly methods for their removal. The main objective of this study was to evaluate the performance of MCM-48 in phenol removal from water. MCM-48 was synthesized and the effective parameters were evaluated. The results showed that maximum absorption of phenol in optimal conditions 0.3g adsorbent, time equals 30 minutes, pH =6, concentration in 2.5 mg / L at a temperature of 298 K and constant engine speed 300 rpm at about 88 percent. The thermodynamic parameters showed an adsorption process is spontaneous and exothermic. The Langmiur model fitted well the experimental data with a maximum adsorption capacity of 38.02.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
329
342
https://jne.ut.ac.ir/article_68674_a2db6a3bab582f8179ecb1c109b5172c.pdf
dx.doi.org/10.22059/jne.2018.224468.1308
Comparison study of the effect of Lignocellulose Nano-fibers (LCNFs) and Chitin Nano-fibers (CNFs) as natural biopolymers on removal of lead ion from aqueous solutions
saeedeh
rastgar
university of gorgan
author
hassan
rezaei
Assistant professor in environmental pollution, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR),
author
hossein
yousefi
Assistant professor in wood and paper engineering, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR),
author
text
article
2018
per
Pollution of aqueous solutions contain heavy metals is one of the serious environmental problems in recent decades. Surface absorption by the use of biological polymers (LCNFs and CNFs) is a novel environmentally friendly technology for reducing and removing heavy metals from industrial wastewater. The goal of this study was to investigate and compare the performance of LCNFs and CNFs adsorbents in the removal of heavy lead from aqueous solutions in a discontinuous system. The test conditions are considered for two completely identical adsorbents. Infrared spectrometer (FT-IR) and transient electron microscopy (TEM) were used to identify the physical, chemical and structural characteristics of LCNFs and CNFs adsorbents. In the discontinuous system, pH parameters (4-9), absorption dose (0.1-1) g, contact time (15-120) min., lead initial concentration (10-50) mg/L and temperature (15-40) °C was studied. The results were analyzed by one-way ANOVA and Duncan's tests for significant evaluation of changes in parameters. Results showed that the highest percentage of removal of lead (98.45%.) for LCNFs at 25 °C, pH 6, 60 min., absorbent dose of 0.3 g and lead concentration of 10 mg/L was obtained. The results of this study showed that LCNFs and CNFs adsorbents is considered as an optimal absorber for removal lead from aqueous solutions by removing more than 98% of lead from aqueous solutions.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
343
357
https://jne.ut.ac.ir/article_68679_389a389029889ab5d362cc1ca450ecd6.pdf
dx.doi.org/10.22059/jne.2018.242728.1435
The most important ecological factors influencing distribution of endangered species (Anagyris foetida L.) inGilan-e-Gharb region
Shahrok
Sabzi
دانشگاه کردستان
author
Hamed
Joneidi
عضو هیات علمی دانشکده منابع طبیعی دانشگاه کردستان
author
parviz
karami
دانشگاه کردستان
author
text
article
2018
per
In order to determine the most important ecological factors affecting distribution of Anagyris foetida, 12 research areas in the Gilan-e-Gharb of Kermanshah province were selected. Sampling of vegetation of each treatment was performed using random- systematic sampling in 20 × 20 square-meter plot and a plot of 1 × 1 m square was applied for understory sampling. Soil samples were taken at a depth of 50 cm in each plot at the foot of the plant and between the plants. Once in the laboratory, some soil physical and chemical properties such as clay, silt, sand, gypsum, lime, electrical conductivity, pH, phosphorus, calcium, magnesium, percentage of stones and pebbles, nitrogen, carbon and potassium were measured. For analysis of the soil and vegetation analysis of variance was applied and, in order to determine the effect of environmental factors on the density and volume of Anagyris foetida covers, the multivariate regression was used. The analysis of variance demonstrated that the factors of slop, pH, magnesium, potasium, nitrogen, clay, sand, canopy, density and size of the habitat have a significant difference at the level of 1% .Regression analysis also showed that 89 percent of the variation in species Anagyris foetida could be justified by nitrogen and slope for the density of the canopy, and N and sand present justified about 50% of the changes in volume of canopy.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
359
369
https://jne.ut.ac.ir/article_68671_3057eca79c7fe2c0865cb586abd8be1d.pdf
dx.doi.org/10.22059/jne.2018.212042.1211
Factors affecting willingness to pay for ecotourism in estimating the value of Taq-e Bostan Kermanshah
Niloofar
Tahmasebizadeh
Department of Environmental Management, College of Science Research Khuzestan, Islamic Azad University, Ahvaz, Iran
author
فاطمه
کریمی اورگانی
استاد یار گروه محیط زیست، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
author
text
article
2018
per
Development of economic activities, population growth, increased life business and higher levels of living standards, increased demand for natural environment and cultural and tourism needs. Taq-e Bostan Collection is one of the most unique monuments of Iran and the world. This historic collection of Kermanshah province was one of the attractions that every year is host to a large number of domestic and foreign tourists. This study eco-tourist value in predicting needs, eliminate deficiencies and develop tourism in the area.Data for the factors affecting the willingness to pay and the value of the collection in 1393, through questionnaires and interviews with visitors from this collection were collected in 1047.The results showed that two factors of gender and visitors from the study are the variables that are willing to pay significant relationship with the age, education, cost of transportation, household size, household income, number of visits, time Visitors travel time and vehicle type (personal or public) is one of the factors affecting willingness to pay and willingness to pay, had no significant effect.The average willingness to pay for each visitor was 4585 USD per visit. In addition to the satisfaction of the utility of first priority (with significance = 0) and sex are the last priority (with significance = 0.121) in the willingness to pay, respectively.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
371
383
https://jne.ut.ac.ir/article_68675_d28b1a3a739f051c9724eab312a9453f.pdf
dx.doi.org/10.22059/jne.2018.229200.1351
The Estimate of Dust Concentration Using of Weather Variable (A Case study: Ahvaz City)
Sajad
Alimahmoodi Sarab
PhD Student / Gorgan University of Agriculture and Natural Resources
author
محمد هادی
معیری
Faculty member/ University of Gorgan University
author
Shaban
Shataee Jouybari
Faculty Member / Gorgan University of Agricultural Sciences and Natural Resources
author
Alireza
Rashki
Faculty Member / Ferdowsi University of Mashhad
author
text
article
2018
per
The amount of dust and other air pollutants have increased during recent years. The PM10 is one of the most important variables that is used for monitoring and assessment of dust pollution. To predict PM10, different studies have used various statistical methods. In this study, two aims were pursuit: 1) Using of Spearman analysis to determine the relation between PM10 and weather variables such as temperature (maximum, average, minimum), relative Humid (maximum, average, minimum), rain, wind (speed and direction), and visibility, and 2) prediction of PM10 with using of Random Forest model on daily data (in a period study: 2008 to 2011). The results of Spearman analysis were shown that PM10 had most relation with visibility and minimum temperature and least relation with rain, -0.376, +0.349, and -0.077, respectively. In addition, Random Forest analysis was shown that for prediction of PM10, visibility and minimum temperature were very important. Fitting curve between observed and prediction data was shown a medium correlation with Y=0.1686x +183.49 and R2=47/0, sig=0.99. Final sequence of trees of random forest was shown that of all data, just maximum and minimum of relative humid and minimum of temperature were able to classification with 396 (>0.205 %), 389(>0.305 %), and 387 (>5.5 oC) data for each variable, respectively.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
385
397
https://jne.ut.ac.ir/article_68673_45496c5ea2d40edb20399a66be202767.pdf
dx.doi.org/10.22059/jne.2018.221268.1280
The Study on the Level of Pollution and Spatial Distribution of Concentrations of Heavy Metals (Cr, Ni, Cu, Pb and Zn) in the Industrial City of Mah-Shahr
فاطمه
محمدعلیزاده
دانشجوی کارشناسی ارشد، گروه محیط زیست، دانشکده کشاورزی و منابع طبیعی،دانشگاه آزاد اسلامی، واحد اهواز، اهواز، ایران
author
Ebrahim
Panahpour
دانشگاه آزاد اسلامی واحد اهواز
author
احد
نظرپور
عضو هیأت علمی گروه زمین شناسی اقتصادی، دانشکده علوم پایه، دانشگاه آزاد اسلامی، واحد اهواز، اهواز، ایران
author
text
article
2018
per
Due to their toxicity and persistence in the environment Heavy metals are one of the most significant soil contaminants. So, it is essential to investigate the distribution of heavy metal for controlling contamination of soil and maintaining the quality of the environment. This study aimed to assess the level of contamination and mapping the spatial patterns of heavy metals like chromium, nickel, copper, lead and zinc in topsoil was performed in Mahshahr in 2016. For this purpose, by the use of systematic sampling method 51 surface soil samples (0-20 cm) were gathered and concentration of these metals was measured by XRF. Also, soil properties such as: EC, pH, lime and soil texture was identified. Pollution index (PI), and Nemerow integrated pollution index (NIPI) was used to determine the soil contamination. Concentration Distribution maps of heavy metals was prepared using the interpolation method in geographic information system (GIS). Principal component analysis (PCA) was performed to investigate the relationship between metals. The results indicated the highest PI of chrome and nickel which are in high contamination level. Many urban soils in Mahshahr have been contaminated with a sort of low or moderate levels of lead, zinc and copper. NIPI showed that all parts are in high pollution levels. The results of principal component analysis indicated that copper, lead, and zinc metals were placed under the same category revealed to be of man-made and common origins. Chromium and nickel have been placed in a separate category and the quantity of pollution index of these metals with high variable coefficient was determined to be of anthropogenic origin.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
399
412
https://jne.ut.ac.ir/article_68672_2dda920bada69d4abf8d1556da675f74.pdf
dx.doi.org/10.22059/jne.2018.220690.1277
Studying the effects of Pb contamination on ADHD occurrence in primary school students
in Tehran
Leila
Namavar
Azad University
author
Mahdiyeh
Salehi
Azad University
author
text
article
2018
per
Studying the effects of Pb contamination on ADHD occurrence in primary school students in Tehran Increasing human population growth along with the urbanization and industrialization of societies, along with their benefits, have caused disadvantages such as increasing environmental pollutants. Among these pollutants are heavy metals such as lead, which have numerous effects on humans, especially children and the elderly, which have been reported in numerous studies. Due to the fact that lead is one of the metals that affects the nervous system, numerous studies have been conducted on the psychological effects of these metals, especially in children.In this study, the concentration of this metal in the nails of normal children and children with ADHD syndrome was studied. After completing the questionnaires, 30 children with ADHD syndrome and 30 normal children regardless of gender were selected. Nail samples were prepared from these children and after acid digestion, the concentration of metals was measured by atomic absorption. The results showed that the mean concentration of lead in children's nails was 23.63.5 μg / g. Based on the results of the effects of increasing the concentration of lead in the nail, ADHD syndrome was increased in children. Therefore, the lead element can be one of the factors involved in the occurrence of ADHD and the necessary measures in this regard must be taken.
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
413
423
https://jne.ut.ac.ir/article_68680_0cd5f0c1833b948e0762c650fb60ffca.pdf
dx.doi.org/10.22059/jne.2018.254549.1497
English Abstracts
text
article
2018
per
Journal of Natural Environment
University of Tehran
2008-7764
71
v.
3
no.
2018
143
145
https://jne.ut.ac.ir/article_70991_d9ce7fd7c13300d5c4964a9ee5a18bcb.pdf
dx.doi.org/10.22059/jne.2018.70991